Field wiring, Table 1. terminal assignments – National Instruments FP-RLY-420 User Manual

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FP-RLY-420

Field Wiring

The terminal base has connections for each of the eight relay
channels and an external supply to power field devices. Each relay
channel of the FP-RLY-420 has two terminals: N.O. (Normally
Open) and I.C. (Isolated Common). The external supply is not
needed for the internal operation of the FP-RLY-420; however,
you may connect an external supply to power field devices by
connecting to the V and C terminals of the terminal base. If you
connect an external supply to the V and C terminals, the total
current supplied cannot exceed 6 A.

Table 1 lists the terminal assignments for the signals of each
channel.

Table 1. Terminal Assignments

Chan-

nel

Terminal Numbers

N.O.

I.C.

sup

COM